From 387d4879500cfc4b887740643061336916f587fb Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Tue, 14 May 2013 14:26:54 -0700 Subject: [PATCH] staging: comedi: dt9812: tidy up the usb endpoint enumeration Only the command_{write,read} usb endpoints are used by this driver. Remove the message_pipe, and {read,write}_stream endpoint information from the usb private data. Rename the variables used for command endpoints to help keep the lines < 80 chars. Also, rename a couple of the local variables used to enumerate the endpoints to also help keep the lines < 80 chars. Signed-off-by: H Hartley Sweeten Cc: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/dt9812.c | 51 ++++++++++--------------- 1 file changed, 21 insertions(+), 30 deletions(-) diff --git a/drivers/staging/comedi/drivers/dt9812.c b/drivers/staging/comedi/drivers/dt9812.c index 3e471baaea0e..ac5629c1a7d0 100644 --- a/drivers/staging/comedi/drivers/dt9812.c +++ b/drivers/staging/comedi/drivers/dt9812.c @@ -273,7 +273,7 @@ struct usb_dt9812 { struct { __u8 addr; size_t size; - } message_pipe, command_write, command_read, write_stream, read_stream; + } cmd_wr, cmd_rd; struct kref kref; u16 analog_out_shadow[2]; u8 digital_out_shadow; @@ -317,12 +317,12 @@ static int dt9812_read_info(struct usb_dt9812 *dev, int offset, void *buf, cmd.u.flash_data_info.numbytes = cpu_to_le16(buf_size); /* DT9812 only responds to 32 byte writes!! */ - ret = usb_bulk_msg(usb, usb_sndbulkpipe(usb, dev->command_write.addr), + ret = usb_bulk_msg(usb, usb_sndbulkpipe(usb, dev->cmd_wr.addr), &cmd, 32, &count, HZ * 1); if (ret) return ret; - return usb_bulk_msg(usb, usb_rcvbulkpipe(usb, dev->command_read.addr), + return usb_bulk_msg(usb, usb_rcvbulkpipe(usb, dev->cmd_rd.addr), buf, buf_size, &count, HZ * 1); } @@ -339,12 +339,12 @@ static int dt9812_read_multiple_registers(struct usb_dt9812 *dev, int reg_count, cmd.u.read_multi_info.address[i] = address[i]; /* DT9812 only responds to 32 byte writes!! */ - ret = usb_bulk_msg(usb, usb_sndbulkpipe(usb, dev->command_write.addr), + ret = usb_bulk_msg(usb, usb_sndbulkpipe(usb, dev->cmd_wr.addr), &cmd, 32, &count, HZ * 1); if (ret) return ret; - return usb_bulk_msg(usb, usb_rcvbulkpipe(usb, dev->command_read.addr), + return usb_bulk_msg(usb, usb_rcvbulkpipe(usb, dev->cmd_rd.addr), value, reg_count, &count, HZ * 1); } @@ -364,7 +364,7 @@ static int dt9812_write_multiple_registers(struct usb_dt9812 *dev, } /* DT9812 only responds to 32 byte writes!! */ - return usb_bulk_msg(usb, usb_sndbulkpipe(usb, dev->command_write.addr), + return usb_bulk_msg(usb, usb_sndbulkpipe(usb, dev->cmd_wr.addr), &cmd, 32, &count, HZ * 1); } @@ -381,7 +381,7 @@ static int dt9812_rmw_multiple_registers(struct usb_dt9812 *dev, int reg_count, cmd.u.rmw_multi_info.rmw[i] = rmw[i]; /* DT9812 only responds to 32 byte writes!! */ - return usb_bulk_msg(usb, usb_sndbulkpipe(usb, dev->command_write.addr), + return usb_bulk_msg(usb, usb_sndbulkpipe(usb, dev->cmd_wr.addr), &cmd, 32, &count, HZ * 1); } @@ -842,8 +842,8 @@ static int dt9812_probe(struct usb_interface *interface, { struct slot_dt9812 *slot = NULL; struct usb_dt9812 *dev = NULL; - struct usb_host_interface *iface_desc; - struct usb_endpoint_descriptor *endpoint; + struct usb_host_interface *host; + struct usb_endpoint_descriptor *ep; int retval = -ENOMEM; int i; u8 fw; @@ -881,51 +881,42 @@ static int dt9812_probe(struct usb_interface *interface, dev->interface = interface; /* Check endpoints */ - iface_desc = interface->cur_altsetting; + host = interface->cur_altsetting; - if (iface_desc->desc.bNumEndpoints != 5) { + if (host->desc.bNumEndpoints != 5) { dev_err(&interface->dev, "Wrong number of endpoints.\n"); retval = -ENODEV; goto error; } - for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { + for (i = 0; i < host->desc.bNumEndpoints; ++i) { int direction = -1; - endpoint = &iface_desc->endpoint[i].desc; + ep = &host->endpoint[i].desc; switch (i) { case 0: + /* unused message pipe */ direction = USB_DIR_IN; - dev->message_pipe.addr = endpoint->bEndpointAddress; - dev->message_pipe.size = - le16_to_cpu(endpoint->wMaxPacketSize); - break; case 1: direction = USB_DIR_OUT; - dev->command_write.addr = endpoint->bEndpointAddress; - dev->command_write.size = - le16_to_cpu(endpoint->wMaxPacketSize); + dev->cmd_wr.addr = ep->bEndpointAddress; + dev->cmd_wr.size = le16_to_cpu(ep->wMaxPacketSize); break; case 2: direction = USB_DIR_IN; - dev->command_read.addr = endpoint->bEndpointAddress; - dev->command_read.size = - le16_to_cpu(endpoint->wMaxPacketSize); + dev->cmd_rd.addr = ep->bEndpointAddress; + dev->cmd_rd.size = le16_to_cpu(ep->wMaxPacketSize); break; case 3: + /* unused write stream */ direction = USB_DIR_OUT; - dev->write_stream.addr = endpoint->bEndpointAddress; - dev->write_stream.size = - le16_to_cpu(endpoint->wMaxPacketSize); break; case 4: + /* unused read stream */ direction = USB_DIR_IN; - dev->read_stream.addr = endpoint->bEndpointAddress; - dev->read_stream.size = - le16_to_cpu(endpoint->wMaxPacketSize); break; } - if ((endpoint->bEndpointAddress & USB_DIR_IN) != direction) { + if ((ep->bEndpointAddress & USB_DIR_IN) != direction) { dev_err(&interface->dev, "Endpoint has wrong direction.\n"); retval = -ENODEV; -- 2.20.1